diff --git a/core/mvcc/cursor.rs b/core/mvcc/cursor.rs
index 0c6292010..6ffade31a 100644
--- a/core/mvcc/cursor.rs
+++ b/core/mvcc/cursor.rs
@@ -46,9 +46,15 @@ impl<Clock: LogicalClock> MvccLazyCursor<Clock> {
     /// Sets the cursor to the inserted row.
     pub fn insert(&mut self, row: Row) -> Result<()> {
         self.current_pos = CursorPosition::Loaded(row.id);
-        self.db.insert(self.tx_id, row).inspect_err(|_| {
-            self.current_pos = CursorPosition::BeforeFirst;
-        })?;
+        if self.db.read(self.tx_id, row.id)?.is_some() {
+            self.db.update(self.tx_id, row).inspect_err(|_| {
+                self.current_pos = CursorPosition::BeforeFirst;
+            })?;
+        } else {
+            self.db.insert(self.tx_id, row).inspect_err(|_| {
+                self.current_pos = CursorPosition::BeforeFirst;
+            })?;
+        }
         Ok(())
     }
 
diff --git a/core/storage/btree.rs b/core/storage/btree.rs
index 02d64507d..f27168818 100644
--- a/core/storage/btree.rs
+++ b/core/storage/btree.rs
@@ -4625,7 +4625,7 @@ impl BTreeCursor {
                         }
                     };
                     let row = crate::mvcc::database::Row::new(row_id, record_buf, num_columns);
-                    mv_cursor.borrow_mut().insert(row).unwrap();
+                    mv_cursor.borrow_mut().insert(row)?;
                 }
                 None => todo!("Support mvcc inserts with index btrees"),
             },
diff --git a/tests/integration/fuzz_transaction/mod.rs b/tests/integration/fuzz_transaction/mod.rs
index 81bf4fb81..24b9aaeac 100644
--- a/tests/integration/fuzz_transaction/mod.rs
+++ b/tests/integration/fuzz_transaction/mod.rs
@@ -505,10 +505,10 @@ async fn test_multiple_connections_fuzz_mvcc() {
             weight_ddl: 0,
             weight_dml: 76,
             dml_gen_options: DmlGenOptions {
-                weight_insert: 34,
-                weight_delete: 33,
-                weight_select: 33,
-                weight_update: 0,
+                weight_insert: 25,
+                weight_delete: 25,
+                weight_select: 25,
+                weight_update: 25,
             },
         },
         ..FuzzOptions::default()